In situ observation of Pt nanoparticles on graphene layers under high temperature using aberration-corrected transmission electron microscopy

Microscopy ◽  
2012 ◽  
Vol 61 (6) ◽  
pp. 409-413 ◽  
Author(s):  
Ayako Hashimoto ◽  
Masaki Takeguchi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Pt Nanoparticles ◽  
In Situ Observation ◽  
Graphene Layers ◽  
Transmission Electron ◽  
Aberration Corrected

scholarly journals In-situ observation of the Changes in Shape and Surface Structure of Pt Nanoparticulate Catalysts in Reactant Gases by Aberration-corrected Environmental Transmission Electron Microscopy

2013 ◽  
Vol 19 (S2) ◽  
pp. 1664-1665
Author(s):  
H. Yoshida ◽  
H. Omote ◽  
M. Haruta ◽  
S. Takeda
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Surface Structure ◽  
In Situ Observation ◽  
Environmental Transmission ◽  
Transmission Electron ◽  
Aberration Corrected ◽  
Environmental Transmission Electron Microscopy

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

In situ observations of Pt nanoparticles coalescing inside carbon nanotubes

RSC Advances ◽  
2014 ◽  
Vol 4 (90) ◽  
pp. 49442-49445 ◽  
Author(s):  
Magdalena Ola Cichocka ◽  
Jiong Zhao ◽  
Alicja Bachmatiuk ◽  
Huy Ta Quang ◽  
Sandeep M. Gorantla ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Electron Irradiation ◽  
Pt Nanoparticles ◽  
Transmission Electron ◽  
In Situ Observations ◽  
Aberration Corrected

In this in situ study, details of the coalescence of Pt nanoparticles encapsulated within carbon nanotubes are investigated whilst under electron irradiation in aberration corrected transmission electron microscopy.

scholarly journals Electron Microscopy Investigation of Magnetization Process in Thin Foils and Nanostructures

2007 ◽  
Vol 1026 ◽  
Author(s):  
Pascale Bayle-Guillemaud ◽  
Aurelien Masseboeuf ◽  
Fabien Cheynis ◽  
Jean-Christophe Toussaint ◽  
Olivier Fruchart ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetic Anisotropy ◽  
Magnetic Induction ◽  
Perpendicular Magnetic Anisotropy ◽  
In Situ Observation ◽  
Magnetic Imaging ◽  
Thin Foils ◽  
Transmission Electron

AbstractThis paper presents investigations of magnetization configuration evolution during in-situ magnetic processes in materials exhibiting planar and perpendicular magnetic anisotropy. Transmission electron microscopy has been used to perform magnetic imaging. Fresnel contrasts in Lorentz Transmission Electron Microscopy (LTEM) and phase retrieval methods such as Transport of Intensity Equation (TIE) solving or electron holography have been implemented. These techniques are sensitive to magnetic induction perpendicular to the electron beam and can give access to a spatially resolved (resolution better than 10 nm) mapping of magnetic induction distribution and could be extended to dynamical studies during in-situ observation. Thin foils of FePd alloys with a strong perpendicular magnetic anisotropy (PMA) and self-assembled Fe dots are presented. Both are studied during magnetization processes exhibiting the capacities of in-situ magnetic imaging in a TEM.

In Situ High-Temperature Transmission Electron Microscopy Observations of the Formation of Nanocrystalline TiC from Nanocrystalline Anatase (TiO2)

1998 ◽  
Vol 4 (3) ◽  
pp. 269-277 ◽  
Author(s):  
A. Agrawal ◽  
J. Cizeron ◽  
V.L. Colvin
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Solid Phase ◽  
Anatase Phase ◽  
High Resolution Electron Microscopy ◽  
Rutile Phase ◽  
Transmission Electron ◽  
New Phase

In this work, the high-temperature behavior of nanocrystalline TiO2 is studied using in situ transmission electron microscopy (TEM). These nanoparticles are made using wet chemical techniques that generate the anatase phase of TiO2 with average grain sizes of 6 nm. X-ray diffraction studies of nanophase TiO2 indicate the material undergoes a solid-solid phase transformation to the stable rutile phase between 600° and 900°C. This phase transition is not observed in the TEM samples, which remain anatase up to temperatures as high as 1000°C. Above 1000°C, nanoparticles become mobile on the amorphous carbon grid and by 1300°C, all anatase diffraction is lost and larger (50 nm) single crystals of a new phase are present. This new phase is identified as TiC both from high-resolution electron microscopy after heat treatment and electron diffraction collected during in situ heating experiments. Video images of the particle motion in situ show the nanoparticles diffusing and interacting with the underlying grid material as the reaction from TiO2 to TiC proceeds.

Motion of Crystal/Crystal and Crystal/Amorphous Interfaces

1990 ◽  
Vol 183 ◽  
Author(s):  
J. L. Batstone
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Grain Boundary ◽  
Boundary Motion ◽  
High Temperature Annealing ◽  
Thermally Activated ◽  
Transmission Electron ◽  
Grain Boundary Motion

AbstractMotion of ordered twin/matrix interfaces in films of silicon on sapphire occurs during high temperature annealing. This process is shown to be thermally activated and is analogous to grain boundary motion. Motion of amorphous/crystalline interfaces occurs during recrystallization of CoSi2 and NiSi2 from the amorphous phase. In-situ transmission electron microscopy has revealed details of the growth kinetics and interfacial roughness.

scholarly journals Optimized High-Temperature In-Situ Transmission Electron Microscopy Double-Tilt Sample Heating Platform

2019 ◽  
Vol 25 (S2) ◽  
pp. 1540-1541
Author(s):  
Daan Hein Alsem ◽  
James Horwath ◽  
Julio Rodriguez-Manzo ◽  
Khim Karki ◽  
Eric Stach
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Temperature ◽  
Sample Heating ◽  
Transmission Electron
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